CAMBRIDGE, Mass.--(BUSINESS WIRE)--Alnylam Pharmaceuticals, Inc. (Nasdaq: ALNY), a leading RNAi therapeutics company, announced today that it has filed a patent infringement lawsuit against Tekmira Pharmaceuticals Corporation in the U.S. District Court of the District of Massachusetts. Alnylam’s infringement suit against Tekmira is based upon Tekmira’s research activities providing lipid nanoparticle (LNP)-formulated small interfering RNA (siRNA) molecules to a pharmaceutical collaborator.